That question deeply depends on what subjects you are trying to print. Otherwise, the K3 ink gamut is seen as residing inside the gamut of the HD inks as a darker area of colors. The black splotches of the K3 inks in the 3D plots can be seen slightly exceeding the gamut of the HD inks in some areas. The HD ink color gamut is shown in color, while the K3 ink color gamut is shown as black to make the difference clearer.Īs can be seen, the new HD inks do indeed have a significantly increased magenta- blue gamut, while orange – yellow is slightly increased. The 3 dimensional graphs below also show the 2 dimensional projections of the two color gamuts.
Thus middle or neutral grey has an Lab value of 50, 0, 0.īased on several sets of measurements, the gamut volume of the HD inks exceeds that of the K3 inks by approximately 8-10%. Higher values of either the a or b channel, either positive or negative, indicate a higher degree of color saturation. The a channel (Green – Magenta) runs from -128 to +127, while the b channel (Blue – Yellow) runs from -128 to +127. The L channel has a value of 0, dark, to 100, bright. L*ab mode solves this problem by making luminance a separate channel. The RGB color mode is fine for many things, but its primary disadvantage is that luminance is confounded with saturation.
Monaco Proof then generated the color profile for each set of prints.įor the analysis, the profiles were entered into Color Think Pro 3.0.3 set to display in L*ab mode. After being allowed to dry overnight, the color patches were measured with an i1 spectrophotometer. Printer profile targets were generated by each printer printing 729 color patches generated by Monaco Proof 3.7.0 profiling software.
Since it features the new 8-color Ultrachrome HD inks that are claimed to have a wider color gamut and print darker blacks, I couldn’t wait to test them against the older 8-color Ultrachrome K3 inks of my Epson Stylus PRO 7800 large format printer.Įpson Ultra-Premium Photo Paper Luster was chosen for the test print medium, as it is a good representative of the “glossy” type photo papers, which have a much wider color gamut that matte photo papers. I recently purchased an Epson SureColor P800 desktop printer.
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